Does Greeneville, TN need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Greeneville is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. That puts Greeneville in the 77th percentile nationally for seismic hazard - higher than 77% of the 4,875 US cities USGS was checked against here.

How Greeneville compares

USGS's underlying values for Greeneville: 0.21g peak ground acceleration, 0.346g at short period, 0.098g at 1 second. Within Tennessee alone, Greeneville ranks 82 of 104 cities by seismic hazard - the 21th percentile in-state. Greeneville has a population of about 15,979.

What a retrofit costs in Greeneville

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Tennessee specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Tennessee.

Earthquake insurance for a Greeneville home

A Greeneville homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Greeneville's figures come from

Greeneville's Category C and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category C does and doesn't tell you about Greeneville.